LARP%20Phase%20II%20Secondary%20Collimator%20RC1

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LARP Phase II Secondary Collimator RC1

• Collimator Test Program

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LARP Phase II Secondary Collimator
RC1Collimator Test Plan

• Near term
• Jaw/Cooling Tube Joint Development
• Single Jaw Thermal Tests
• Later this year
• Design and fab hardware for Mechanical Prototype
  Tests

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Jaw/Cooling Tube Joint DevelopmentPurpose
determine appropriate joint configuration
fabrication methods

• May 9th
• Cooling Tube
• Jaw Center
  Mandrel

• In process.. target completion date
• Square hollow magnet conductor for first test 9
  mm x 9 mm
• Copper jaw and mandrel
• Cu-Au braze
• After first braze, machine coil o.d. for correct
  fit to jaw i.d.
• After second braze, section assy to inspect
  coverage
• Round tubing with grooved (?) mandrel is next

70 mm dia
100 mm dia
100 mm
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Development/Test Lab
Item availability
Chiller existing
Vacuum equipt SLAC misc?
Heater controller select/buy
Gantry select/buy
Tools, table select/buy
Instrumentation select/buy
Power/water to be installed
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Single Jaw Thermal Test

• Purpose measure cooling effectiveness and
  thermal deformations
• Current focus purchase long lead items
  concurrently with FEA predictions and mechanical
  design of required test hardware.
• Next Milestones Copper Jaw target is mid June
• Experiment hardware
  test set-uptarget early is July
• Internal helical cooling tube
• Collimator midpoint stop and flexible end
  supports
• Commercial electric resistance heaters, coupled
  with thermal grease
• SS power 10 kW, evenly distributed
• No transient testing
• FE model test gt validation of simulations
• No Jaw rotation
• Perform test under inert gas, insulated in air,
  or under vacuumTBD

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Single Jaw Thermal Test setup
Thermocouples measure temperature distribution
Reference bar, water cooled to maintain
straightness (radiation shield ?)
Standoffs fix jaw distance to reference bar at
center
Capacitive proximity sensors at ends
Flexible end mounts
Orientation may be rotated 90o, or 180o or on end
Water cooling
2 x 5 kW heaters, coupled with thermal grease
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Single Jaw Test Thermocouple Locations

• Thermocouples recessed into Jaw slightly below
  the surface
• Spaced along Heater length and around Jaw
  circumference
• Should yield the Jaw heating profile predicted by
  the FE analysis

2 x 5kW Heaters

• 12 x Thermocouples

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RC1 Mechanical Prototype Test

• Purpose bench top testing of the jaw actuating
  mechanism in CERN orientations
• Current Focus Preliminary engineering
  definition, system analysis sizing of
  components. Target completion .. mid June
• Next Milestone Engineering drawings/detailed
  design. Target.. Dec
• CERN adjustment mechanism used
• Addl CERN Phase 1 components as appropriate
• Vacuum tank with easy access
• Realistic cooling water feed-throughs and
  flexible connections
• Simplistic control system for jaw aperture and
  rotation
• Minimal instrumentation connections for position,
  temperature, etc.
• Probably no heat loading

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RC1 Mechanical Prototype
FY07 RC1 consists of jaws, tank actuators -
evaluated for horizontal (shown), vertical (90o)
and skew (/- 45o) orientations.
FY08, RC2
Variant use CERN vac tank, dummy jaws of correct
weight